Mask



v 17632349 June 1927' E. I. McKESSON MASK Filed July 17 1924 2Sheets-Sheet 1 INVENTEI 25W A1":- TEX June 14, 1927. 1,632,449

E. l. M KESSQN MASK Filed July 17, 1924 2 Sheets-Sheet 2 lNVENTu U NEYPatented June 14,1921.

ELMEBII. u xnsson, or TOLEDO, 01:10.

MASK.

Application as July 17,

" This invention relates to adaptable articles, I

semi-stable as to their form, with special readily manipulated or willautomatically A duct 1 as a source of nitrous oxid and oxygen, is s vingin Y-fitting 2'having branches 3 therefrom to L-fittin s structurethereof;

conform in adapting to varying facial proportions as gas tight fittingsfor the administration of anaesthetic, restorative, or treatment gasesthrough oral and nasal orifices of atients.

eferringto the drawings: Fig. 1 is a' fragmentary viewof an embodimentof the invention as a nasal mask;

Fi .2 is' a view looking into'the mask as aapted to a wide nose; v

Fig. 3 is a view similar to Fig. 2 with the, maskreadapted for a narrownose; parts being broken away to show more clearly the maskopeningrestrictin flap;

Fig. 4 is a side elevation of the mas partially pulled open to disclosethe bullt up Fig. 5 is a detail view of a wire cloth cup for a maskframe lamination; v

Fig. 6 shows an embodiment of the invention in a face "mask for fittingover both the nose and mouth; Y F Fig. 7 is a section on the lineVII-VII, i.6; ig. 8 isda view looking into the mask of N 9 is a partialsection on the line IX- X, Fig. 8.

as supply,- say own terminat- 4 having-threaded ends as protruding trough openings 5 in the mask walls extending to the mask interior andthere engaged by a nut 6 to effect gas tight detechable' assembly. I

The mask is shown as built up of laminations, preferably rubber and wirecloth. Uncured rubber sheet .7 is placed over a dome shaped form ormold. Perforate or mesh providing metal sheet of wire cloth 8 cu pad toapproximate the form of the mo] is-placed over the sheet 7, and theouter mold element is brought into position thereover for cold pressinthese two plies -into assembly with the ru her to an ent hitting with orenterin into the me'shesof the cloth 8. Additiona ply 9 of rubber isthen placed over the sheet 8 and cold pressed,

andlikewise a second ply 10 of wire cloth 198. Serial No. 726,476.

over the ply 9 is cold pressed therewith. A final ply 11 of rubber overthis outer cloth 10, completes the assembly of the lies of uncuredrubber and the metal in buil g up the mask frame.

With the plies assembled in the frame, the perforations are made for theopenings 5, and the mask frame subjected to steam press action forcuring. A

Studs 12 one for each side'of the mask,

are Y rivete in osition therewith. These may be engaged y loops 13 ofharness 14 to extend about the head of the atient for yieldably holdingthe mask in t e desired position on the atients face. The twinconnections 3 to t e mask, render it bi-laterally symmetrical, with notendency to be twisted away from it's location a surgeon or attendant beholding or shifting the patients he of removal of tonsils.

'The cups 8, 10,- are preferably given a binding 15, say of tape, theso-called friction tape as used in connection with rubber repair work.This gives the wires of'the cloth a holding againet fraying out, resistsworking of the wire, e ds' into the rubber and out of the mask wal s,and as the plies of the rubber extend slightl beyond the wireeven thoughad, say during the course mask or cup opening which is restricted by Iflap 17 from the p y -7. This fla 17 is elastic, normallyextending-inward y from the mask opening, and in a nasal mask preferablyhas a marginal extent coextensive with i the nose seating portions, butmay be absent at lip engaging portion 18 of the mask, for at thisportion the mask may ride up snugly in such fleshy lip portion to effectgas tight sealing.

' The mask isshown as having outlet'o ening 19 to chamber 20 as a metalfitting aving set screw 21 adjustable to vary the action of spring 22resisting the u'nseating of valve disk 23, therebyv allowing exhalationescape ,by openings 24, 25;

The frame of the mask, notwithstanding it is largely of rubber. isrendered inelastic,

though left pliable, while the flap 17 as ainask curtain is elastic. The

opening restricting p iable properl o thev .inask to be manipulated intowidely varying forms in adapting to the man types of faces, and insuchadaptation pr uces a gas tight fitting.

the mask frame permits In carrying out the invention hereof for thattype of mask which may cover both the nose and the mouth the cup frameor body may be generally of the type shown for the nasal mask in Fig. 1.In practice, there ma not be as much occasion for this type of ma to bemani ulated for giving it difierent forms or s apes althoug such may bea feature thereof.

Herein, the hollow channel or head 16 with the flap gether coact 1nproducin a structure which when held against the ace of the patientwill, as to the rib or bead 16, conform generally to the variousfeatures of the patient, while the flap 17 inwardly therefrom asdistended by the bead 16, readily lies against the skin of the facein asealing relation. These features, accordingly, give this face mask 26 arange of effective sealing use, even for applying pressure in deliveringases to the patient with a known relations ip of the ingredients ofsuchgases, say for anaesthesia, due to the fact that there is no leakageeither way about this mask as sealing on the face of the patient.

In practice it may be convenient to have these masks interchangeable,say for infant and adult sizes. To this end, the mask 26 is providedwith an extension 27 integral with the body of the mask 26. Thisextension 27 has molded therein metallic sleeve 28 which may have thetapered rubber thereon providean easy assembly .gas ti ht frictionfitting as a slip joint with tu ular extension 29 as a fitting on theduct 1. The flap 17 as extending inwardly from the head 16, is

17 inwardly therefrom, to-

yieldably held in shape and does not curl on itself or have any cur ingaction whatsoever. This sealing is directly against the face of thewearer as a flat engagm portion.

What is claimed and it is esired to secure by Letters Patent is:

1. A mask embodyin a pliable inelastic frame including plies 0 wirecloth with its warp and woof of overlapping plies angularly ofli'set,said frame having an opemng variable by frame manipulation to retaindifferent adjustments, said frame includin elastic plies of sheetrubber, one of whic extends beyond said frame as an opening restrictingflap;

2. A mask-embod ing a pair of wire cloth cups, a ply of rub ertherebetween, and a pair of housing plies thereover, one of said pliesextending to form a flap at the on opening, the other terminating beyondsai cups to provide a holdin lip directed inwardly from which sai fiapextends in opening restricting position.

3. A mask having a pliable unitary inelastic body providing an openinthere being a flexible elastic web integra with said body and continuousfrom both-the inner and outer walls of the mask body and inwardlyextending from the body at said opening for restricting said 0 eningeffective extent, said web. being hel by the body against curling and inmask use u on the face of a patient being directed by t e body into fiatadherent position over the patient s face as a marginal seal for themask.

In witness-whereof I aflix my signature.

ELMER I. MCKESSON.

